Malicious PDF — malware analysis report

Static analysis result for SHA-256 01af8631875c6189…

MALICIOUS

PDF

63.3 KB Created: 2020-08-03 19:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0cd4597c0ba9037ce98f5478757895a1 SHA-1: 2ea144332d94baa92f76ec28323b07d073945595 SHA-256: 01af8631875c61893e05dba46e0f4acb1b3e2cdc7dd5a0f2f3cc6bc453e3dff2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=impact+of+internet+on+students+academic+performance+questionnaire+pdf, which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other links pointing to benign Shopify domains, likely as a lure. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=impact+of+internet+on+students+academic+performance+questionnaire+pdf In PDF document text
    • http://files.tenwebtv.com/uploads/1/3/0/9/130969714/litikikenan.pdfIn PDF document text
    • http://files.edncf.org/uploads/1/3/0/8/130814118/ab9753.pdfIn PDF document text
    • http://files.missionmuffins.org/uploads/1/3/1/3/131383821/c89a2bf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5801/1035/files/79667870803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/65293553943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/69020797885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/94003153996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/98321079581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1274/9469/files/78701737565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/4016622476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/gorakupogugak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0049/4241/files/furax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8053/8526/files/tiworker._exe_high_cpu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nunixa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23E 5332 bytes
SHA-256: 466df16f2b8711cafece8d6bcfd64cabc94d7def43234d92f2feb170e33563d6
font_01_sfnt_off0000c446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC446 13500 bytes
SHA-256: 1c6f57efb8f501ead1d87fb70a81e818b5a768b3c944c637c943210ec79ec308

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